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CVE-2021-0339

24
FAUCET Score

CVE-2021-0339 is a local escalation of privilege vulnerability in Android's WindowContainer.java, affecting Android versions 8.1, 9, and 10. It allows a malicious app to remain visible while a legitimate app is brought to the foreground, requiring user interaction for exploitation. With a CVSS score of 7.8 (High), this vulnerability could lead to high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.1CPE matchmatch criteria
cpe:2.3:o:google:android:8.1:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:google:android:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:google:android:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 47th percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

googlepatch availablevia nvd_reference
View patch

References

source.android.com / security/bulletin/2021-02-01
PatchVendor Advisory